photo-lithaco



2 Sheets-Sheet 1.

J. W. COX.

Sofl Rubber Cutter.

Nb. 24,426. Patented June 14, 1859.

AE'eZe Elevator.

Witnesses:

' Inventor.

AM. P iOTO-LITHO.E0. N.I.(DSBORN E'S PROCESS.)

2 Sheets-Sheet J. W. COX.

Soft Rubber Cutter.

No. 24,426. Patented June 14, 1859.

Witnesses: 1

Inventor AM. PHDTO-LITHQCD.N.Y. (OSBORNE'S PROCESS.)

UNITED 30s.. w. 002;, or MALDEN,

PATENT OFFICE;

MASSACHUSETTS, ASSIGNOR T0 HORACE H. DAY, 01? New YORK, N. Y.

MAoHfNE FOR QUTT I G mom-RUBBER Iirro THREADS.

Speeificationof Letters Patent 24,426, dated June 14, 1859.

and ig. 5 ross yert-ical section taken at the line ,B of F g; 2.?

l lhegsame letters indicatelike parts in all fie res-fl. p

,1 my. P 1 1 ,i t e, arts. indi rub-.4 r'and -g'q-tta'epe ch r; eq i l tgums: Whe er. yulfcj ni e r o her i eelpt pe edr. re ll ilf l-to, 'eue tare na ro s r ps, and moreparticularly' intd threads for'th'e anuf ct eQ zshirre -.;anl ot erI asticv ab ie (the qu y :Qf whi h. i b ti s i nagreat m asll ef nel el t upon the r g lari y erfl v en ss o su h el sic. strips Qlftihlead i nd, e mam Qf-a m h ne 9 1 h pro.-

fl es. tram mate and .a' lpne w h nothe has 9 b 9 fe a By my in've t qa.I:- eiiable t pnq luee 91 1 la et r a sj or 'strips of perfectly un form,width and thickness and: at y erylitt1e.}cost, [and this I:

accomplish in the following ,manner; The

india, rubber .or, equiyale'nt, or preparation; re t Whether r l eni d.Or JQ =YP1 d ad o h wi e r'r p lylp na e s i st. rolled in theusualmanner intosheets f uni-1' form thickness dependent upon ,the intend edf"cf lthe strips or threads to be produced. The $heet (o r sheets) :thuspr o; duced is; rolledup into a roll of the required sizefdepndenfluponthe capacity of the mag ch iiiein iwhi ch th cuttingis to beefl'ected,and transe t roli'is inserted in a concave. i i fmoun n ags mb e' e i ew end of thefroll pilojectmg slightly beyondthe. front end ofth'eclampi; Within the clamp there a follower'lwhi'ch, acts' 'on the rear,end ofthe'roll, and which, atthe end of each completelopera'tion of themachine is moved forwardand by it the roll toa distance equal to theintended Width of the strip 'or thread to be cut, and then the clamp isclosed to hold the roll firmly, while, by a slow and regular lateralmovement of the carriage, the roll is presented to the cutting edge of arapidly rotating disk cutter, mounted on the end of a mandrel or spindleby which it is cut, and as jthe plane of ,motion of the cutter isparallel with the lateral motion of the carriage and ;at right angles tothe axis of the roll, a disk, ;as it were, iscut'offfrom the end, of the,roll, which produces, whenlunrolled, a strip'or {thread of perfectlyuniform Width, and as {the roll from whichit is cut, ,was formed by Irolling up a sheet or sheets of uniform thick,- ness, it follows thatthe strips or threads lthus produced must be of perfectly uniformtthickness and widthlfrom end to end At Ethe end of each' operation thecarriage reitturns to its first position, the clamp is opened toliberatethe. roll that it may be ,moved forward the required distance for angiotheri cut, the clamp is again closed andithe carriage again moved topresent the roll to the cutting action of the cutter.

Asindia rubber andequivalentg ums', or

mixtures, or preparations thereof, ,by virtue of theirv elasticity, whenbrought, in close contact with solid, surfaces exclude atmos? 'phericair, attraction of cohesion iresults. It fo'llows from this that if theface of the diskcutter were in the plane of the cutting edge such facewould, during I the cutting operation, have to run in contact with the'face offthe roll produced bythe cutting and these 'surfaces wouldbecome highly" heated, which would {result in injury to both. To aypidthis I make the face of the cutter con cave-or ,dishing so,that vthecutting edge alone shall be in contact with the roll; Andas it isessential to the practical cutting of. these substances that the cuttinedge be supplied with water .I pass atube connected with a. suitablehydraulic apparatus) through the mandrel or spindle, madehollow ,forthat purpose, and bend the end of it sojas to lie inthe'concayity of thecutter disk that a Stream of water, may be discharged against thecutting edge while cutting. 4

the accompanying drawings (a) rep: resentsl a suitableframe with puppets(1) b)' in which are mounteda hollow mandrel or spindle (0), proyided'.with a pulley ("(Z), driqen at ahigh Velocity by, a belt .flfom some,suitable motor, and carryin on its, front end a concavo-conyex metallicdisk (8") the front face being concave, and the iio concavity extendingto or nearly to the edge, which should be made of good steel and sharp.A tube (6), is inserted in the hollow of the mandrel, the front end isbent around so as to lie in the concavity of the disk, and the end isflattened as represented so as to discharge a thin sheet of wateragainst the cutting edge. The rear end of this'tube back of the mandrelis to be coupled in any suitable manner with a hose or pipe leading to ahead or reservoir of water. Forward of thecutter disk the frame isprovided with suitable ways f), on which slides a carriage (g), thatcarries a pair of hollow or concave clamps (h h), each properly securedto bearing pieces The The concave inner face of these clamps should beof such form as nearly to inclose the roll to be cut, there being anarrow bed like bar (/0), on top of the carriage the upper surface ofwhich is a continuation of the curvature of the clamps, and betweentheir lower edges. The roll rests and slides on this bed when notclamped. The under side of this bed-like bar is rabbeted on each side asat (Z Z), to extend over the lower part of the bearing pieces (2' z), toadmit of their their moving freely in operating the clamps and yet holdthem down. The lower ends of the bearing pieces (2' i), are fitted toslide on transverse ways (m), making 'part of the carriage, and two ofthem extend down through the carriage and the underface of their lowerends is cut out and threaded to straddle two parallel screws (n n). The

' shafts of these two screws carry each a pinion (0), both of whichengage an intermediate pinion (p), provided with a crank handle (g), bymeans of which both screw shafts can be turned simultaneously and in thesame direction whether to the right or left, and each shaft is threadedwith a right and with a left screw, and the two bearing pieces of oneclamp engage and are operated by the right'handed threads on the twoshafts and the bearing pieces of the other clamp engage and are operatedby the left handed thread, so that when the crank handle (9), is turnedin one direction the two clamps will be drawn toward each other to clampthe roll between them, and when turned in the opposite direction theclamps will be separated to liberate the roll. These operations are tobe performed by the attendant' whose presence is required to watch theprogress of the work; but if desired the skilful mechanician will findno difficulty in applying the requisite mechanism for deriving therequired clamping and unclamping movements from the motions of thecarriage. The unclamping of the roll is to be done as the carriage isreturning after each cutting operation, that the roll may be free to bemoved forward toward the end of this return motion of the carriage, therequired movement for this purpose being derived from the carriage. Andthe carriage may be moved alternately in opposite directions by hand orautomatically by any of the known mechanisms for a similar purpose notnecessary to be described.

For the purpose of insuring the retention of all the convolutions of theroll during the entire operation a disk of gutta percha of the requiredsize is heated, to render it tacky, and in that state applied to therear end of the roll to which it sticks, and in that condition it isinserted between the clamps while open, and the disk of gutta perchapressed against a follower (7'), to which it will slightly adhere,although this is not indispensable. The follower (1'), is a disk ofmetal or other suitable material corresponding in form with and ofslightly less diameter than the section of the roll. It is operated by,and attached to the front face of an arm (8), in the manner represented,or in any other suitable manner. The lower end of the arm (8), is fittedto slide in a groove (t), in the upper face of the bed which thusbecomes the guide for its movements, and the upper end is provided witha long nut (M), which embraces the thread of a screw shaft ('0), bywhich the follower is operated. The screw shaft is mounted so as to turnin suitable boxes in two standards (w w) of the carriage, that all theseparts may move with and make part of the carriage. On one end of thescrew shaft there is secured a ratchet wheel (00), and by the side ofthe ratchet wheel a disk lever (y), that turns freely on the shaft. Thisdisk lever carries a spring pawl or ratchet hand (.2), which, when thelever is turned in the direction ofthe arrow imparts motion to theratchet wheel and screw shaft the thread of which acting on the nutmoves the arm (8) and follower to push the roll forward the requireddistance. The arm of thevratchet disk (y), is connected by a link (a),with the slotted arm (6), of a bent lever that turns on a stud pin (0)on :the carriage. This bent lever has a weighted ?arm (03), by which theconnections of the 'ratchetare balanced, and it has also another arm(6), which as the carriage approaches the end of its motion in bothdirections strikes against stops (f f) to impart the required motion. Onthe back movement it strikes the stop (f) to impart the required motionto push out the roll the required distance for one cut, and at the endof the cutting motion it strikes the stop (f) to throw back the ratchethand to its original position preparatory to another operation. Thesestops are adjustable on a rod (9) attached to the frame that they may bead- 'justed to the range of motion of the carriage and the rangeofmotion to be given to the follower and roll at each operation isregumy said invention are equally applicable to' trimming blocks ofindia rubber, or analogous gums or preparations thereof or cutting disksor slabs of such material.

What I claim as my invention and desire to secure by Letters Patentis 1. In combination With the concave rotary cutter, substantially asdescribed the employment of a tube placed in the concavity thereofsubstantially as described for the discharge of a jet of water againstthe cut ting edge as described.

2. I also claim the carriage with its divided clamp and follower,substantially as described, in combination with a rotary cutter,substantially as described or any equivalent cutter, for the purpose setforth.

3. And finally I claim in combination with the carriage clamp andfollower, substantially as described, the mechanism or any equivalentthereof, for operating the follower, substantially as described.

JOSEPH W. COX;

Witnesses:

E. G. THOMPSON, B. W. GniswoLn.

